Practice questions 7 Flashcards Preview

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Flashcards in Practice questions 7 Deck (30):
1

What is the molecular basis of Fragile X

trinucleotide repeat in an intronic region

2

what is the molecular basis of huntingtons

trinucleotide repeat in an exonic region

3

what ligament is most commonly damanged in a whiplash injury

anterior longitudinal

4

what class of drugs are tricyclic antidepressants related to

phenothiazines

5

what is the nerve supply to the epiglottis

superior laryngeal

6

during development what prominence gives rise to the lower eyelids

maxillary prominence

7

what taste modality relies on a G protein linked pathway and adenylate cyclase to promote release of neurotransmitter

sweet

8

where is the amygdala

anterior tip of the hippocampus

provides emotional components to experience and memory

9

what are the symptoms of Kluver Bucy

hypersexuality
hyperorality
flattened emotions
loss of fear and conditioning
visual agnosia

patients can understand vocalized emotions

10

what part of the brain is involved in procedural memory (skills)

cerebellum

11

which phase of stroke is tissue destruction and liquefactive necrosis associated with

subacute

12

what is the blood supply to the internal capsule

striate (perforating arteries)

supplies deep structures in the cerebrum
strokes in these vessels are common due to being a branch of the MCA

13

what artery does the MCA branch from

internal carotid

14

describe the course of the MCA

passes laterally just underneath the frontal lobe, and ends up the lateral sulcus

15

where is blood from a subarachnoid haemorrhage most likely to be seen on a CT

suprasellar cistern

16

name the brain cisterns

supracellar
pontine
cisterna magna

17

where is the cisterna magna

just bellow the cerebellum

18

where are shunts most commonly inserted for hydrocephalus

fourth ventricle

19

if a patient is asked to look inwards and upwards what muscle is being tested

inferior oblique

20

what nerve passes through the tendinous ring

oculomotor (not trochlear)

21

what is the term used to describe speech patterns that are robotic or monotonic

aprosodias

22

what pathological finding is more likely to be found in preproliferative diabetic retinopathy compared to background retinopathy

cotton wool spots

23

what does the saccule monitor

increase in velocity in the vertical plane

24

what are the effects of benzodiazepines

sedative, hypnotic, anxiolytic, anticonvulsant, muscle relaxants

25

what receptors do benzodiazepines work on

GABAa receptors

26

what can cause a lesion in the optic chiasm

pituritary gland growth

27

what is the effect of an optic tract lesion

contralateral homonymous hemianopia

28

what is the optic radiation

geniculostriate pathway
neurons from the lateral geniculate nucleus of the thalamus carrying visual information to the visual (striate) cortex along the calcarine fissure

29

if the left pupillary light reflex does not work but the right consensual reflex does, what is the lesion

occulomotor

30

what are the side effects of opiods

respiratory depression
reduced GI motility
bradycardia
pupil constriction (may be useful in diagnosis of opoid overdose)